MOTION


 * [|MULTIPLE CHOICE questions - NEWTON's Laws of Motion]**

speed = how fast something is moving
i.e. distance travelled - displacement - over time taken

Speed is a measure of the distance an object travels in a given length of time
 * [[image:http://img.sparknotes.com/content/testprep/bookimgs/sat2/physics/0001/05.average.gif align="absMiddle"]]


 * speed is a SCALAR quantity **

average velocity = [[image:http://img.sparknotes.com/content/testprep/bookimgs/sat2/physics/0026/phy.total71.gif align="absMiddle"]]

 * velocity is a VECTOR quantity **

acceleration
Acceleration

Speed and velocity only deal with movement at a constant rate. When we speed up, slow down, or change direction, we want to know our **acceleration**. Acceleration is a vector quantity that measures the rate of change of the velocity vector with time: average acceleration = @SPEED & ACCELERATION